Apparatus for boring out tubes.



No. 690,878. Patented Jan. 7, I902.

J. BOAN.

APPARATUS FOR BORING OUT TUBES.

(Application filed Aug. 3, 1901., (No Model.)

5 Sheets-Sheet l.

No. 690,878. Patented Jan. 7, 1902.

V J. EGAN. APPARATUS FOR 50mm: OUT TUBE-S.

(Application filed Aug. 3, 1901.)

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wibvwoou I um 690,878. Patented Ian. 7, I902;

' .s. ROAN. I

APPARATUS FOR BORING OUT TUBES.

(Application filed Aug. 3, 1901.) (Ho. M o d e I.)

5 Sheets-Sheet 3.

Patented Ian. 7, I902.- J. ROAM.

APPARATUS FOR BORING 'UUT TUBES.

' (Application filed Aug. 3, 1901.1 3

' Sweets-Sheet 4.

(No Model.)

w n m No. 690,878. Patented Ian. 7, I902;

.L-ROAN, I

APPARATUS FOR BORING OUT TUBES.

, (Application 'filed Aug. 8, 1901.\ v I 5 Sheets-Sheat'i;

(No Model.)

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UNTTED STATES PATENT @TTTQE.

JAMES ROAN, OF PORTSMOUTH, VIRGINIA.

APPARATUS FOR BORING OUT TUBES.

SPECIFICATION forming part of Letters Patent No. 690,878, dated January 7, 1902.

Virginia, have invented certain new and useful Improvements in Apparatus for Boring Out Tubes, of which the following is a speci fication.

The apparatus hereinafter described, while I no it may be employed for boring tubes and cylinders generally, has been designed with special reference to its usein boring out the tubes of condensers used in ice-plants for the purpose of condensing the exhaust steam, the

x 5 water which acts as the condensing or cooling agent passing through the tubes. When the water is held in the tubes, a coating is deposited on the inside of the tubes very much the same as in a water-tube boiler, and in the absence of an apparatus which will remove this coating it becomes necessary to take the tubes out and retube the condenser. It is in this connection that my apparatus will be described, although, as above said, it is not limited to this particular use, but can be employed in a number of other connections.

I will first describe by reference to the accompanying drawings, forming part of this specification, an apparatus embodying my 0 improvements, and will then point out more particularly in the claims those features of the same which I believe to be new and of my own invention.

In the drawings, Figure 1 is a perspective 3 5 view of the apparatus in the position which it occupies when ready for use in connection with a condenser. I omit from this figure all parts of the condenser except the ring up against which the front end of the apparatus 0 is bolted. Fig. 2 is a sectional side elevation of the apparatus. Fig. 3 is a section on line 3 3, Fig. 2, looking toward the front end of the apparatus. Fig. 4 is a perspective view of the traveling carriage in which the leadscrew is mounted. Fig. 5 is a perspective View of the fixed nut and its supporting-frame at the front of the apparatus, through which the lead-screwpasses'. This nut is preferably a divided nut to facilitate the return of the lead-screw to the starting-point, and in this figure one-half of the nut is represented as removed.

. Serial No. 70,787. (No model.)

A is a lon gleadscrew, which at its front end has a bit a, provided with a removable cutter 2), held in place by a set-screw c. The lead-screw at its rear end is provided with a beveled gear B, which gears with another like gear B, mounted on a shaft 0, through which motion is imparted to the gears, and consequently to the lead-screw. The gears B B and the shaft Care mounted in bearings in a carriage D, provided with sleeves d, which fit and are capable of longitudinal movement on fixed guide-rods E, attached at front and rear to standsF G. In the front standG is mounted a nut H, preferably a divided nut. The lead-screw passes through and engages this nut. The rotation of the lead-screw causes the feed of the said screw, the carriage D, which carries the driving mechanism, participating in the longitudinal movement of the screw and sliding on the four guide rods or bars E. The nut H is mounted in a supporting plate or frame I, provided with sleeves 'i to fit and slide upon the vertical legs of the stand G, set-screws 2" being provided to hold the same in any position to which they may be adjusted up or down on the stand G.

To provide for the lateral adjustment of the lead-screw, the stand G is connected to and supported by horizontal plates J at top and bottom. These plates are bolted, as atj, to the ring V of the condenser W, the bolts passing into the bolt-holes already formed in the ring through slots j in the plates. The stand G is secured to these plates by clamp-bars K, between which and the plates the legs of the stand are clamped and held by means of bolts 70, which pass through longitudinal slots 7c in the plates J. By loosening these bolts the stand G can be moved laterally. Provision for similar adjustment of the rear end of the apparatus is made. For this purpose the rear stand consists of two upright posts F, upon which fit the sleeves f of the bracket-plate F, to which latter the rear ends of the rods E are secured. The sleeves f are vertically movable upon the stand-posts F and are held in their adjusted position by set-screwsf. The posts F are provided with feetf which rest on the floor or may be attached to a floor-plate that rests on the floor, and they are movable laterally bodily and together. In this way the lead-screw with its cutter can be brought opposite to any one of the tubes to of the condenser W which it is desired to bore out. When after the lead-screw has been brought into alinement with the condensertube to be bored out the driving-gear is put in motion, the lead-screw rotates and in so doing advances the cutter into the tube, the carriage D participating in the lengthwise movement of the lead-screw. After the tube has been bored out the cutter and lead-screw can be withdrawn by reversing the direction of rotation of the latter; but as a simple way of effecting this the nut His divided, so that one of its halves can be taken out, as shown in Fig. 5, and then the lead-screw and its attached parts can be readily and quickly pulled back.

The shaft 0 can be rotated in any suitable way either by poweras, for example, by a small motor mounted on the carriage D-0r by hand through the intermediary of a crankhandle, as will be understood without further explanation.

Having described my improvements and the best way now known to me of carrying the same into effect, what I claim herein as new, and desire to secure by Letters Patent, is as follows:

1. The front and rear stands, the nut-supce ars porting frame sleeved on the'front stand, the feed-nut, longitudinalguide-rods attached at the front to the nut-supporting frame, and sleeved upon the rear stand, and means for holding the frame and rods in their adjusted position upon said stands,in combination with a carriage mounted on said guide-rods and a lead screw and drivinggearing therefor mounted in said carriage as and for the purposes hereinbefore set forth.

2. The front and rear stands, and the plates to which the front stand is secured so as to be laterally adjustable with relation thereto, in combination with the feed-nut and its supporting-frame the guide-rods extending between and connecting said stands, said nutsupporting frame and guide-rods being vertically adjustable bodily and together relatively to the stands, the carriage supported by and movable on the guide-rods, and the lead screw and driving gearing therefor mounted in the carriage, substantially as and for the purposes hereinbefore set forth.

In testimony whereof I have hereunto set my hand.

JAMES ROAN.

Wit nesses:

R. L. STEPHENSON, WM. PETERS. 

